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Stochastic (E x B) diffusion of ions in a spatially periodical potential field

机译:离子在空间周期性势场中的随机(E x B)扩散

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This paper discusses the stochastic (E x B) motion of ions in the homogeneous magnetic held and in the spatially periodical electrostatic potential. This approach is used for the simulation of ion diffusion in potential structures formed at the boundary plasma in tokamaks. We show that the ion motion in such structures scales with a single dimensionless parameter R, which is a combination of amplitude and dimension of potential structures, magnetic held intensity and ion charge/mass ratio. The presented results show that for sufficiently large values of R, the intrinsic stochasticity regime of ion motion appears, which results in the spatial diffusion of ions. The diffusion coefficient is sufficiently high for heavy impurities. Possible further applications are mentioned. [References: 19]
机译:本文讨论了均质磁性保持态和空间周期性静电势中离子的随机(E x B)运动。该方法用于模拟托卡马克中边界等离子体处形成的势能结构中的离子扩散。我们表明,此类结构中的离子运动具有单个无量纲参数R,该参数是势能结构的振幅和尺寸,磁保持强度和离子电荷/质量比的组合。给出的结果表明,对于足够大的R值,会出现离子运动的固有随机性,这会导致离子的空间扩散。对于重杂质,扩散系数足够高。提到了可能的其他应用。 [参考:19]

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